<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			// var len1 = ({} + {}).length; // toString
			// var len2 = ([] + []).length; // toString
			// var len3 = (function(){}).length; // 求形参的长度：arguments.callee.length
			
			// console.log(len1, len2, len3);
			var obj = {
				use: "asfisf"
			}
			var objNew = Array.prototype.slice.call(obj);
			
			
		</script>
	</body>
</html>
